* {
    padding: 0;
    margin: 0;
}

html,
body {
    width: 100%;
    height: 100%;
}

body {
    min-width: 1200px;
}

.top {
    width: 100%;
    height: 80px;
    background-color: rgb(255, 255, 255);
    box-shadow: 0px -2px 16px -5px rgba(32, 31, 31, 0.4);
}

.top_cen {
    width: 1200px;
    height: 100%;
    margin: 0 auto;
    position: relative;
}

.top_cen div {
    float: left;
}

.top_cen div:nth-child(1) {
    width: 220px;
    height: 80px;
    background: url(../images/dllogo.png);
}

.top_cen div:nth-child(2) {
    font-size: 28px;
    position: absolute;
    top: 30px;
    left: 230px;
    color: #434343;
}

.top_cen div:nth-child(3) {
    position: absolute;
    right: 0;
    bottom: 10px;
    /* font-size: 16px; */
}

.top_cen div:nth-child(3) a {
    color: red;
}
.center{
    width: 1200px;
    margin: 0 auto;
    position: relative;
    /* border: 1px solid red; */
}
form{
    margin: 50px auto;
    width: 400px;
}
form input{
    width: 400px;
    height: 50px;
    font-size: 17px;
    margin: 10px auto ;
    padding: 0 20px;
    outline: none;
}
form input:nth-child(5){
 position: absolute;
 left: 50%;
 transform: translateX(-45%); 
 border: none;
 /* background-color: red; */
 /* color: white;   */
}
form input:nth-child(6){
    position: relative;
    top: 60px;
    left: 50%;
    transform: translateX(-45%);   
    border: none;
    background-color: red;
    color: white;  
}
/* ------------------------- */
.bottom {
    width: 100%;
    height: 100px;
    position: absolute;
    bottom: -200px;
    border-top: 1px solid rgb(173, 171, 171);
    /* overflow: hidden; */
}
.bottom ul{
    width: 902px;
    margin: 15px auto;
    list-style: none;
}
.bottom ul li{
    width: 80px;
    height: 13px;
    line-height: 13px;
    float: left;
    text-align: center;
    border-right: 1px solid rgb(0, 0, 0);
}
.bottom ul li:last-child{
    border: none;
}
.bottom ul li a{
  font-size: 13px;
}
.bottom div{
    width: 280px;
    margin: auto;
    position: relative;
}
.bottom div p{
    font-size: 13px;
    text-align: center;
    position: absolute;
    top: 20px;
}